Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
holbrookservice.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-30 07:40:05 UTC · ↺ Refresh
MX Hostnames
- d319147a.ess.barracudanetworks.com
- d319147b.ess.barracudanetworks.com
MX Priorities
- d319147b.ess.barracudanetworks.com: 10
- d319147a.ess.barracudanetworks.com: 0
A / AAAA Records
- 54.68.88.54 ↩ ec2-54-68-88-54.us-west-2.compute.amazonaws.com
Mail Server IPs
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
- 209.222.82.253 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
ns1.dnsbycomodo.net admin.dns.com 2025042901 10800 864000 7200 7200
Primary NS (mname)
ns1.dnsbycomodo.net
Admin Email (rname)
admin@dns.com
Serial
2025042901
Refresh
10800s
Retry
864000s
Expire
7200s
Minimum TTL
7200s
Nameservers (NS)
ns1.dnsbycomodo.net
ns2.dnsbycomodo.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.ess.barracudanetworks.com include:spf.protection.outlook.com include:_spf.salesforce.com exists:%{i}._spf.corp.salesforce.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; ruf=mailto:[email protected]; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- MS=BB67C44AB64A22F197024A95B7463C54AB17D00C
- SPFv=spf1 include:spf.ess.barracudanetworks.com include:spf.protection.outlook.com include:_spf.salesforce.com exists:%{i}._spf.corp.salesforce.com -all
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